#include "help_ex.h"
LOCALINFO g_Li;
RENDERINFO g_Ri;

LPVOID GetProcAddr(LPCWSTR szMod, LPCSTR szApi)
{
    LPVOID ret = nullptr;
    HMODULE hLib = GetModuleHandleW(szMod);
    if (hLib == 0)
    {
        hLib = LoadLibraryW(szMod);
        if (hLib != 0)
        {
            ret = GetProcAddress(hLib, szApi);
            FreeLibrary(hLib);
        }
    }
    else
    {
        ret = GetProcAddress(hLib, szApi);
    }
    return ret;
}

//取系统缩放比例
DOUBLE GetSysDpi()
{
    HDC desktopDc = GetDC(NULL);
    DOUBLE dpiA = (DOUBLE)GetDeviceCaps(desktopDc, DESKTOPHORZRES) / GetDeviceCaps(desktopDc, HORZRES);
    DOUBLE dpiB = (DOUBLE)GetDeviceCaps(desktopDc, LOGPIXELSX) / 0.96 / 100;
    ReleaseDC(NULL, desktopDc);
    if (dpiA == 1)
    {
        return (dpiB);
    }
    else if (dpiB == 1)
    {
        return (dpiA);
    }
    else if (dpiA == dpiB)
    {
        return (dpiA);
    }
    else
    {
        return 1;
    }
}

std::vector<std::wstring> ws_split(const std::wstring &str, const std::wstring &delim)
{
    std::wstring stra = str;
    std::vector<std::wstring> tokens;
    // Skip delimiters at beginning.
    std::string::size_type lastPos = stra.find_first_not_of(delim, 0);
    // Find first "non-delimiter".
    std::string::size_type pos = stra.find_first_of(delim, lastPos);
    while (std::string::npos != pos || std::string::npos != lastPos)
    {
        // Found a token, add it to the vector.
        tokens.push_back(stra.substr(lastPos, pos - lastPos));
        // Skip delimiters.  Note the "not_of"
        lastPos = stra.find_first_not_of(delim, pos);
        // Find next "non-delimiter"
        pos = stra.find_first_of(delim, lastPos);
    }
    return tokens;
}

BOOL Ex_MemFree(LPVOID hMem)
{
    if (hMem != nullptr)
    {
        return HeapFree(GetProcessHeap(), 0, hMem);
    }
    return FALSE;
}

LPVOID Ex_MemAlloc(size_t dwSize, INT dwFlags)
{
    return HeapAlloc(GetProcessHeap(), 8, dwSize);
}

LPVOID Ex_MemReAlloc(LPVOID hMem, size_t dwSize)
{
    return HeapReAlloc(GetProcessHeap(), 8, hMem, dwSize);
}

INT DtoHimetric(INT d, INT PerInchc)
{
    return MulDiv(d, 2540, PerInchc);
}

LONG_PTR __get(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(LONG_PTR *)a;
}

INT __get_int(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(INT *)a;
}

FLOAT __get_float(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(FLOAT *)a;
}

SHORT __get_short(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(SHORT *)a;
}

CHAR __get_char(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(CHAR *)a;
}

UCHAR __get_unsignedchar(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(UCHAR *)a;
}

WCHAR __get_wchar(LPVOID lpAddr, LONG_PTR offset)
{
    size_t a = (size_t)lpAddr + offset;
    return *(WCHAR *)a;
}

LONG_PTR __set(LPVOID lpAddr, LONG_PTR offset, LONG_PTR value)
{
    size_t *a = (size_t *)((size_t)lpAddr + offset);
    LONG_PTR old = *a;
    *a = value;
    return old;
}

INT __set_int(LPVOID lpAddr, LONG_PTR offset, INT value)
{
    size_t a = (size_t)lpAddr + offset;
    INT old = *(INT *)a;
    *(INT *)a = value;
    return old;
}

void __set_char(LPVOID lpAddr, LONG_PTR offset, CHAR value)
{
    size_t a = (size_t)lpAddr + offset;
    *(CHAR *)a = value;
}

SHORT __set_short(LPVOID lpAddr, LONG_PTR offset, SHORT value)
{
    size_t a = (size_t)lpAddr + offset;
    SHORT old = *(SHORT *)a;
    *(SHORT *)a = value;
    return old;
}

void __set_unsignedchar(LPVOID lpAddr, LONG_PTR offset, UCHAR value)
{
    size_t a = (size_t)lpAddr + offset;
    *(UCHAR *)a = value;
}

void __set_wchar(LPVOID lpAddr, LONG_PTR offset, WCHAR value)
{
    size_t a = (size_t)lpAddr + offset;
    *(WCHAR *)a = value;
}

FLOAT __set_float(LPVOID lpAddr, LONG_PTR offset, FLOAT value)
{
    size_t a = (size_t)lpAddr + offset;
    FLOAT old = *(FLOAT *)a;
    *(FLOAT *)a = value;
    return old;
}

BOOL __query(LPVOID lpAddr, LONG_PTR offset, LONG_PTR value) //OK
{
    return (*(LONG_PTR *)((size_t)lpAddr + offset) & value) == value;
}

BOOL __query_int(LPVOID lpAddr, LONG_PTR offset, INT value) //OK
{
    return (*(INT *)((size_t)lpAddr + offset) & value) == value;
}

void __del(LPVOID lpAddr, LONG_PTR offset, LONG_PTR value) //OK
{
    size_t a = (size_t)lpAddr + offset;
    *(LONG_PTR *)a = *(LONG_PTR *)a - (*(LONG_PTR *)a & value);
}

void __add(LPVOID lpAddr, LONG_PTR offset, LONG_PTR value) //OK
{
    size_t a = (size_t)lpAddr + offset;
    *(LONG_PTR *)a = *(LONG_PTR *)a | value;
}

void __addn(LPVOID lpAddr, LONG_PTR offset, LONG_PTR value) //OK
{
    size_t a = (size_t)lpAddr + offset;
    *(LONG_PTR *)a = *(LONG_PTR *)a + value;
}

void __subn(LPVOID lpAddr, LONG_PTR offset, LONG_PTR value) //OK
{
    size_t a = (size_t)lpAddr + offset;
    *(LONG_PTR *)a = *(LONG_PTR *)a - value;
}

void _bit_add(size_t *dwValue, size_t index /*0-31 */) //OK
{
    *dwValue |= (size_t)1 << index;
}

void _bit_del(size_t *dwValue, size_t index /*0-31 */) //OK
{
    *dwValue &= ~((size_t)1 << index);
}

void _bit_not(size_t *dwValue, size_t index /*0-31 */) //OK
{
    *dwValue ^= (size_t)1 << index;
}

BOOL _bit_test(size_t *dwValue, size_t index /*0-31 */) //OK
{
    return *dwValue >> index & (size_t)1;
}

LPVOID __ptr_ins(LPVOID *ptr, INT nCount, INT *nIndexInsert, INT cbBlock, LPVOID pNewItem)
{
    if (cbBlock <= 0)
        cbBlock = sizeof(size_t);
    if (*nIndexInsert <= 0 || *nIndexInsert > nCount + 1)
        *nIndexInsert = nCount + 1;
    LPVOID pNew = Ex_MemAlloc((nCount + 1) * cbBlock);
    if (pNew)
    {
        if (*ptr)
        {
            RtlMoveMemory(pNew, *ptr, (*nIndexInsert - 1) * cbBlock);
            RtlMoveMemory((LPVOID)((size_t)pNew + *nIndexInsert * cbBlock), (LPVOID)((size_t)*ptr + (*nIndexInsert - 1) * cbBlock), (nCount - *nIndexInsert + 1) * cbBlock);
            Ex_MemFree(*ptr);
        }
        if (pNewItem != 0)
        {
            RtlMoveMemory((LPVOID)((size_t)pNew + (*nIndexInsert - 1) * cbBlock), pNewItem, cbBlock);
        }
    }
    *ptr = pNew;
    return pNew;
}

LPVOID __ptr_index(LPVOID ptr, INT nCount, INT nIndex, INT cbBlock)
{
    if (nIndex <= 0 || nIndex > nCount)
        return 0;
    if (cbBlock <= 0)
        cbBlock = sizeof(size_t);
    return (LPVOID)((size_t)ptr + (nIndex - 1) * cbBlock);
}

LPVOID __ptr_del(LPVOID *ptr, INT nCount, INT nIndex, INT cbBlock)
{
    if (cbBlock <= 0)
        cbBlock = sizeof(size_t);
    if (nIndex <= 0 || nIndex > nCount)
        return *ptr;
    LPVOID pNew = Ex_MemAlloc(nCount * cbBlock);
    if (pNew)
    {
        if (*ptr)
        {
            RtlMoveMemory(pNew, *ptr, (nIndex - 1) * cbBlock);
            EX_REPORTLIST_COLUMNINFO *ptc = (EX_REPORTLIST_COLUMNINFO *)((size_t)*ptr + (nIndex - 1) * sizeof(EX_REPORTLIST_COLUMNINFO));
            RtlMoveMemory((LPVOID)((size_t)pNew + (nIndex - 1) * cbBlock), (LPVOID)((size_t)*ptr + nIndex * cbBlock), (nCount - nIndex) * cbBlock);
            Ex_MemFree(*ptr);
        }
    }
    *ptr = pNew;
    return pNew;
}

void _wstr_deletechar(LPVOID lpstr, INT *dwsize, WCHAR wchar)
{
    LPVOID lpstart = lpstr;
    WCHAR *lpend = (WCHAR *)((size_t)lpstart + *dwsize);
    BOOL fMoved = FALSE;
    while (lpstart < lpend)
    {
        lpstart = wcschr((WCHAR *)lpstart, wchar);
        if (lpstart == 0)
        {
            break;
        }
        else
        {
            lpend = (WCHAR *)((size_t)lpend - 2);
            memmove(lpstart, (WCHAR *)((size_t)lpstart + 2), (size_t)lpend - (size_t)lpstart);
            fMoved = TRUE;
        }
    }
    if (fMoved)
    {
        __set_wchar(lpend, 0, 0);
        *dwsize = (size_t)lpend - (size_t)lpstr;
    }
}

void A2W_Addr(LPVOID lpszString, LPVOID *retPtr, size_t *retLen, INT CodePage, INT dwLen)
{
    if (CodePage == 0)
        CodePage = 936;
    if (dwLen <= 0)
        dwLen = lstrlenA((LPCSTR)lpszString);
    INT uLen = MultiByteToWideChar(CodePage, 0, (LPCCH)lpszString, dwLen, NULL, 0) * 2;
    if (IsBadWritePtr(*retPtr, uLen + 2))
    {
        *retPtr = Ex_MemAlloc(uLen + 2);
    }
    if (uLen > 0)
    {
        MultiByteToWideChar(CodePage, 0, (LPCCH)lpszString, dwLen, (LPWSTR)*retPtr, uLen);
    }
    *retLen = uLen + 2;
}

void U2W_Addr(LPVOID lpUTF8, INT dwLen, LPVOID *retPtr, size_t *retLen)
{
    A2W_Addr(lpUTF8, retPtr, retLen, CP_UTF8, dwLen);
}

void ANY2W(LPVOID pAddr, size_t dwLen, LPVOID *retPtr, size_t *retLen)
{
    if (dwLen > 2)
    {
        short bom = __get_short(pAddr, 0);
        if (bom == -17425) //utf8-bom
        {

            U2W_Addr((LPVOID)((size_t)pAddr + 3), dwLen - 3, retPtr, retLen);
        }
        else if (bom == -257) //unicode
        {
            if (IsBadWritePtr(*retPtr, dwLen - 2))
            {
                *retPtr = Ex_MemAlloc(dwLen - 2);
            }
            RtlMoveMemory(*retPtr, (LPVOID)((size_t)pAddr + 2), dwLen - 2);
            *retLen = dwLen - 2;
        }
        else
        {
            if (HIWORD(bom) == 0)
            {
                if (IsBadWritePtr(*retPtr, dwLen))
                {
                    *retPtr = Ex_MemAlloc(dwLen);
                }
                RtlMoveMemory(*retPtr, pAddr, dwLen);
                *retLen = dwLen;
            }
            else
            {
                INT cp = CP_UTF8;
                INT ulen = MultiByteToWideChar(cp, 8, (LPCCH)pAddr, dwLen, 0, 0);
                if (ulen == 0)
                {
                    cp = 936;
                    INT ulen = MultiByteToWideChar(cp, 0, (LPCCH)pAddr, dwLen, 0, 0);
                }
                if (ulen > 0)
                {
                    ulen = (ulen + 1) * 2;
                    if (IsBadWritePtr(*retPtr, ulen))
                    {
                        *retPtr = Ex_MemAlloc(ulen);
                    }
                    if (ulen > 0)
                    {
                        MultiByteToWideChar(cp, 0, (LPCCH)pAddr, dwLen, (LPWSTR)retPtr, ulen);
                        *retLen = ulen;
                    }
                }
            }
        }
    }
}

std::wstring a2w(std::string str)
{
    char const *szAnsi = str.c_str();
    //预转换，得到所需空间的大小
    int wcsLen = ::MultiByteToWideChar(CP_ACP, NULL, szAnsi, strlen(szAnsi), NULL, 0);
    //分配空间要给'\0'留个空间，MultiByteToWideChar不会给'\0'空间
    wchar_t *wszString = new wchar_t[wcsLen + 1];
    //转换
    ::MultiByteToWideChar(CP_ACP, NULL, szAnsi, strlen(szAnsi), wszString, wcsLen);
    //最后加上'\0'
    wszString[wcsLen] = '\0';
    std::wstring ret = wszString;
    delete[] wszString;
    wszString = NULL;
    return ret;
}

void PrintArray(UCHAR *data, INT len)
{
    std::string str;
    str.push_back('{');
    for (INT index = 0; index < len; index++)
    {
        str = str + std::to_string(data[index]);
        if (index != len - 1)
        {
            str.push_back(',');
        }
    }
    str.push_back('}');
    std::cout << str << std::endl;
}

INT GetNearestPrime(INT value)
{
    INT prime = 0;
    INT i = 0;
    while (value >= prime)
    {
        i = i + 1;
        prime = i * i + i + 41;
    }
    return prime;
}

BOOL Ex_ReadFile(LPCWSTR filePath, std::vector<CHAR> *retData)
{
    BOOL fOK = FALSE;
    if (filePath != L"")
    {
        HANDLE hFile = CreateFileW(filePath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
        if (hFile != INVALID_HANDLE_VALUE)
        {
            DWORD nSize = GetFileSize(hFile, NULL);
            if (nSize != INVALID_FILE_SIZE)
            {
                (*retData).resize(nSize);
                fOK = ReadFile(hFile, &(*retData)[0], nSize, &nSize, NULL);
            }
            CloseHandle(hFile);
        }
    }
    return fOK;
}

/* 读取RC资源 */
BOOL Ex_ReadResSource(WORD lpname, LPCWSTR lpType, std::vector<CHAR> *retData)
{
    BOOL fOK = FALSE;
    /* 检查参数有效性 */
    if (lpname)
    {
        /* 查找资源 */
        HRSRC hRsrc = FindResourceW(NULL, MAKEINTRESOURCE(lpname), lpType);
        if (NULL == hRsrc)
            return (FALSE);

        /* 获取资源的大小 */
        DWORD dwSize = SizeofResource(NULL, hRsrc);
        if (dwSize == 0)
        {
            return (FALSE);
        }

        /* 加载资源 */
        HGLOBAL hGlobal = LoadResource(NULL, hRsrc);
        if (hGlobal == 0)
        {
            return (FALSE);
        }

        /* 锁定资源 */
        LPVOID pBuffer = LockResource(hGlobal);
        if (pBuffer == NULL)
        {
            return (FALSE);
        }

        (*retData).resize(dwSize);
        RtlMoveMemory((*retData).data(), pBuffer, dwSize);
        fOK = TRUE;
        /*
		 * 在资源使用完毕后我们可以不需要使用 UnlockResource和FreeResource来手动地释放资源
		 * 因为它们都是16位Windows遗留下来的，在Win32中，在使用完毕后系统会自动回收。
		 */
        UnlockResource(hGlobal);
        FreeResource(hGlobal);
    }
    return (fOK);
}

void _struct_destroyfromaddr(LPVOID lpAddr, size_t Offset)
{
    LPVOID tmp = (LPVOID)__get(lpAddr, Offset);
    if (tmp)
    {
        Ex_MemFree(tmp);
        __set(lpAddr, Offset, 0);
    }
}

LPVOID _struct_createfromaddr(LPVOID lpAddr, size_t Offset, INT sizeofstruct, INT *nError)
{

    LPVOID tmp = (LPVOID)__get(lpAddr, Offset);
    if (tmp == 0)
    {
        tmp = Ex_MemAlloc(sizeofstruct);
        if (tmp == 0)
        {
            *nError = ERROR_EX_MEMORY_ALLOC;
        }
        else
        {
            __set(lpAddr, Offset, (size_t)tmp);
        }
    }
    return tmp;
}

void RC4(LPVOID dst, size_t dstlen, const LPVOID pwd, size_t pwdlen)
{
    size_t i, j, x;
    UCHAR m[256], k[256], temp;

    if (pwdlen == 0)
        return;

    for (i = 0, j = 0; i < 256; ++i)
    {
        m[i] = (UCHAR)i;
        k[i] = ((UCHAR *)pwd)[j];
        if (++j == pwdlen)
            j = 0;
    }

    for (i = 0, j = 0; i < 256; ++i)
    {
        j = (j + m[i] + k[i]) & 255;
        temp = m[i];
        m[i] = m[j];
        m[j] = temp;
    }
    for (x = 0, i = 0, j = 0; x < dstlen; ++x)
    {
        i = (i + 1) & 255;
        j = (j + m[i]) & 255;
        temp = m[i];
        m[i] = m[j];
        m[j] = temp;
        ((UCHAR *)dst)[x] ^= m[(m[i] + m[j]) & 255];
    }
}

const UINT32 table[] = {
    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
    0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
    0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
    0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
    0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
    0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
    0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
    0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
    0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
    0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
    0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
    0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
    0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
    0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
    0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
    0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
    0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
    0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
    0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
    0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
    0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
    0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};

UINT Crc32_Addr(LPVOID buf, UINT nLength) //OK
{
    if (nLength < 1)
        return 0xffffffff;

    UINT CRC32 = 0xFFFFFFFF; //设置初始值

    for (DWORD i = 0; i < nLength; ++i)
        CRC32 = table[(CRC32 ^ ((UCHAR *)(buf))[i]) & 0xff] ^ (CRC32 >> 8);

    return CRC32 ^ 0xFFFFFFFF;
}

LPVOID prefixstring(LPCWSTR lpString, INT dwFmt, INT *nOffset)
{
    LPVOID ret = nullptr;
    if ((dwFmt & DT_NOPREFIX) == 0)
    {
        const wchar_t *lpOffset = wcschr(lpString, 38);
        if (lpOffset != 0)
        {
            INT len = lstrlenW(lpString) * 2;
            *nOffset = (size_t)lpOffset - (size_t)lpString;
            ret = Ex_MemAlloc(len);
            if (ret != 0)
            {
                RtlMoveMemory(ret, lpString, *nOffset);
                RtlMoveMemory((LPVOID)((size_t)ret + *nOffset), (LPVOID)((size_t)lpString + *nOffset + 2), len - *nOffset - 2);
            }
        }
    }
    return ret;
}

LPCWSTR GetErrorMessage(DWORD error)
{
    WCHAR szBuf[1024];
    WCHAR *lpMsgBuf;
    FormatMessageW(
        FORMAT_MESSAGE_ALLOCATE_BUFFER |
            FORMAT_MESSAGE_FROM_SYSTEM |
            FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        error,
        0,
        (LPWSTR)&lpMsgBuf,
        1024, NULL);
    swprintf_s(szBuf, L"%s", lpMsgBuf);
    return (LPCWSTR)szBuf;
}

LPCWSTR copytstr(LPCWSTR lptstr, INT len)
{
    if (lptstr)
    {
        LPCWSTR addr = (LPCWSTR)Ex_MemAlloc(len * 2 + 2);
        if (addr != 0)
        {
            RtlMoveMemory((LPVOID)addr, lptstr, len * 2 + 2);
        }
        else
        {
            Ex_SetLastError(ERROR_EX_MEMORY_ALLOC);
        }
        return addr;
    }
    return NULL;
}

INT wstr_compare(LPCWSTR wstr1, LPCWSTR wstr2, BOOL caseSensitive)
{

    INT nStrlen1 = lstrlenW(wstr1) + 1;
    INT nStrlen2 = lstrlenW(wstr2) + 1;
    for (INT nIndex = 0; nIndex <= ((nStrlen1 > nStrlen2 ? nStrlen1 : nStrlen2) - 1) * 2; nIndex += 2)
    {
        WCHAR cha1 = *(WCHAR *)((size_t)wstr1 + nIndex);
        WCHAR cha2 = *(WCHAR *)((size_t)wstr2 + nIndex);
        if (caseSensitive == FALSE)
        {
            if (cha1 >= 65 && cha1 <= 90)
            {
                cha1 = cha1 + 32;
            }
            if (cha2 >= 65 && cha2 <= 90)
            {
                cha2 = cha2 + 32;
            }
        }
        INT nCmp = cha1 - cha2;
        if (nCmp != 0)
        {
            return nCmp;
        }
    }
    return 0;
}